Contents UNITS 5 Tr i ang l e s 35 • Definition and classification of triangles • Notable lines and points of a triangle • How to construct triangles: given three sides; and given two sides and the angle they form • Construct figures with triangles 6 Quad r i l a t e r a l s 43 • Definition and classification of quadrilaterals • How to construct parallelograms: construct a rhomboid and a diamond given its diagonals • Construct isosceles trapeziums given the sides and the height; construct trapeziums given one of the sides, the diagonals and the height; and construct trapezoids given the four sides and a diagonal • Construct figures and landscapes using quadrilaterals 7 Re gu l a r po l ygon s 51 • Elements of a polygon • How to construct a regular polygon: a triangle, a hexagon, a square and an octagon inscribed in a circumference • Construct decorative shapes with polygons F i na l a c t i v i t i e s 5 9 • An activity bringing together all the points covered in this book • Digital resources: draw a star with Inkscape • Create a design and add figures to it using Inkscape G l o s s a r y 6 3 • Technical drawing terms that are used in this material UNITS 1 Us i ng s e t s qua r e s 5 • Draw lines at angles of 30°, 45° and 60° • Draw parallel lines • Construct shapes with set squares • Use set squares to draw angles greater than 90° 2 Us i ng a c ompa s s 13 • Recommendations for using and looking after a compass • Draw perpendicular lines with a compass • Draw the perpendicular bisector of a segment • Draw a straight line parallel to another straight line • Divide a segment into equal parts • Construct figures with a compass 3 Ang l e s 19 • Definition and classification of angles • How to construct angles: make an exact copy of an angle, bisect an angle and trisect a right angle • Construct figures with a compass and set squares 4 Th e c i r c umf e r e n c e and t h e c i r c l e 27 • The circumference and its elements • The circle and its divisions • Constructions using a compass: a circumference that passes through three given points; a figure formed by arcs of a circumference; and decorative figures formed by circumferences
RkJQdWJsaXNoZXIy